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| DOI | 10.5194/tc-12-1551-2018 |
| A new digital elevation model of Antarctica derived from CryoSat-2 altimetry | |
| Slater T.; Shepherd A.; Mcmillan M.; Muir A.; Gilbert L.; Hogg A.E.; Konrad H.; Parrinello T. | |
| 发表日期 | 2018 |
| ISSN | 19940416 |
| 卷号 | 12期号:4 |
| 英文摘要 | We present a new digital elevation model (DEM) of the Antarctic ice sheet and ice shelves based on 2.5×108 observations recorded by the CryoSat-2 satellite radar altimeter between July 2010 and July 2016. The DEM is formed from spatio-temporal fits to elevation measurements accumulated within 1, 2, and 5 km grid cells, and is posted at the modal resolution of 1 km. Altogether, 94 % of the grounded ice sheet and 98 % of the floating ice shelves are observed, and the remaining grid cells north of 88° S are interpolated using ordinary kriging. The median and root mean square difference between the DEM and 2.3×107 airborne laser altimeter measurements acquired during NASA Operation IceBridge campaigns are ĝ'0.30 and 13.50 m, respectively. The DEM uncertainty rises in regions of high slope, especially where elevation measurements were acquired in low-resolution mode; taking this into account, we estimate the average accuracy to be 9.5 m - a value that is comparable to or better than that of other models derived from satellite radar and laser altimetry. © Author(s) 2018. |
| 学科领域 | altimeter; CryoSat; digital elevation model; floating ice; ice sheet; ice shelf; measurement method; radar; satellite altimetry; spatiotemporal analysis; Antarctica |
| 语种 | 英语 |
| scopus关键词 | altimeter; CryoSat; digital elevation model; floating ice; ice sheet; ice shelf; measurement method; radar; satellite altimetry; spatiotemporal analysis; Antarctica |
| 来源期刊 | Cryosphere
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/119158 |
| 作者单位 | Centre for Polar Observation and Modelling, School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, United Kingdom; Centre for Polar Observation and Modelling, University College London, London, WC1E 6BT, United Kingdom; ESA ESRIN, Via Galileo Galilei, Frascati RM, 00044, Italy |
| 推荐引用方式 GB/T 7714 | Slater T.,Shepherd A.,Mcmillan M.,et al. A new digital elevation model of Antarctica derived from CryoSat-2 altimetry[J],2018,12(4). |
| APA | Slater T..,Shepherd A..,Mcmillan M..,Muir A..,Gilbert L..,...&Parrinello T..(2018).A new digital elevation model of Antarctica derived from CryoSat-2 altimetry.Cryosphere,12(4). |
| MLA | Slater T.,et al."A new digital elevation model of Antarctica derived from CryoSat-2 altimetry".Cryosphere 12.4(2018). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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